Defining a Radiation Cavity Approximation

You can apply approximate cavity radiation to describe heat transfer by radiation in enclosures. The average temperature in the cavity is computed at the beginning of each increment and held constant over the increment. Therefore, the average-temperature radiation condition has some dependency on the increment size, and you need to ensure that the increment size you use is appropriate for your model.

Note: Create a temperature initial condition to establish the starting temperature before solving any simulation with temperature-dependent features.

See Also
About Radiation Cavity Approximation
In Other Guides
Support Selection
Feature Manager
  1. From the Thermal section of the action bar, click Radiation Cavity Approx .
  2. Optional: Enter a descriptive Name.
  3. Select one or more faces as the geometry supports in the model.

    The selected faces must define an enclosed cavity.

  4. Enter the Emissivity of the selected faces.

    The emissivity value must be between zero and one.

  5. Click OK.